Amazon Linux 2023 Security Advisory: ALAS2023-2026-1363
Advisory Released Date: 2026-01-23
Advisory Updated Date: 2026-01-23
Severity:
Medium
Issue Overview:
libheif is an HEIF and AVIF file format decoder and encoder. Prior to version 1.21.0, a crafted HEIF that exercises the overlay image item path triggers a heap buffer over-read in `HeifPixelImage::overlay()`. The function computes a negative row length (likely from an unclipped overlay rectangle or invalid offsets), which then underflows when converted to `size_t` and is passed to `memcpy`, causing a very large read past the end of the source plane and a crash. Version 1.21.0 contains a patch. As a workaround, avoid decoding images using `iovl` overlay boxes. (CVE-2025-68431)
Affected Packages:
libheif
Issue Correction:
Run dnf update libheif --releasever 2023.10.20260120 or dnf update --advisory ALAS2023-2026-1363 --releasever 2023.10.20260120 to update your system.
More information on how to update your system can be found on this page: Amazon Linux 2023 documentation
New Packages:
aarch64:
libheif-debuginfo-1.19.8-1.amzn2023.0.3.aarch64
libheif-tools-debuginfo-1.19.8-1.amzn2023.0.3.aarch64
heif-pixbuf-loader-debuginfo-1.19.8-1.amzn2023.0.3.aarch64
libheif-debugsource-1.19.8-1.amzn2023.0.3.aarch64
heif-pixbuf-loader-1.19.8-1.amzn2023.0.3.aarch64
libheif-devel-1.19.8-1.amzn2023.0.3.aarch64
libheif-1.19.8-1.amzn2023.0.3.aarch64
libheif-tools-1.19.8-1.amzn2023.0.3.aarch64
src:
libheif-1.19.8-1.amzn2023.0.3.src
x86_64:
heif-pixbuf-loader-debuginfo-1.19.8-1.amzn2023.0.3.x86_64
libheif-debuginfo-1.19.8-1.amzn2023.0.3.x86_64
libheif-tools-debuginfo-1.19.8-1.amzn2023.0.3.x86_64
heif-pixbuf-loader-1.19.8-1.amzn2023.0.3.x86_64
libheif-debugsource-1.19.8-1.amzn2023.0.3.x86_64
libheif-devel-1.19.8-1.amzn2023.0.3.x86_64
libheif-tools-1.19.8-1.amzn2023.0.3.x86_64
libheif-1.19.8-1.amzn2023.0.3.x86_64